Lock.



W. J. CARROLL.

LOCK.

APPLICATION FILED SEPT. 12, 1904.

Patented Sept. 15,1908.

' 3 SHEETS-SHEET 1.

w. J. CARROLL:

LOOK.

APPLICATION FILED SEPT. 12, 1904.

, Patented Sept. 15, 1908.

3 SHEETS-SHEET 2.

l/Juana;

lie 91/04 WLMW W. J. CARROLL.

LOCK.

APPLICATION FILED SBPT.12,1904.

398,434, Patented Sept. 15,1908.

3 SHEETS-SHEET 3.

UNITED STATES PATENT OFFICE.

WILLIAM J. CARROLL, OF NEW HAVEN, CONNECTICUT, ASSIGNOR TO SARGENT & COMPANY, OF NEW HAVEN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

LOCK.

Specification of Letters Patent.

Patented Sept. 15, 1908.

To all whom it may concern:

Be it known that I, WILLIAM J. CARROLL, of the city and county of New Haven, State of Connecticut, have invented new and useful Improvements in Locks, of which the following is a full, clear, and exact description when taken in connection with the accompanying drawings, which form a part thereof, and in which Figure 1 represents an end elevation of a lock embodying my invention, Fig. 2, a side elevation of the same, the cap plate having been removed, Figs. 3, 4 and 5 are similar views of the upper portion of the lock, the

bolts being shown 1n various positions, Fig. I

6, a similar view with the tum lers removed, Fig. 7, a reverse view of the parts shownin Flg. 6, Figs. 8 and 9 are, transverse vertical sections on lines 88 and 9 9, respectively,

of Fig. 2, Fig. 10, an enlarged detail view of the checking dog, Fig. 11, a detail View of the connecting lever, and Figs. 12 and 13, detail views of two of the keys adapted for use in the lock In all figures, similarv letters of reference represent like parts.

' This invention relates to looks, and more particularly tothatclass adapted for use on thedoors of hotels, or other public buildings, where a number of keys for the same lockare in the hands of diflerent' individuals, For use in such buildings, locks are often soconstructed that a person on the inside of the door, as, for example, the guest, may look thedoor and by leaving his key in the lock prevent the door from being unlocked by any person, such as a chambermaid, porter, or other guest, having a key to the same look. At the same time, in case of accident it is often desirable that the door may be unlocked from the outside, even while the guest key is in its place in the lock.

One of the objects of this invention, is to produce a novel and eflicientlock, which will lave the advantage suggested above, and to this and other ends, the invention consists of the several improvements and combinations of parts set forth and claimed hereinafter.

Referring to the drawings for a more articular description, the part designated b the. letter A represents the case of the lock (herein shown in the form of a mortise lock) and B the face plate. 0 designates the latch bolt, D the'yoke, and E the hub of the knob 2) lies at one side of the key the/other side, or inside, of the lock case.

Between the key bolts F and G is pivoted on a post J in the case a connecting lever L, one end of which projects into a slot or recess M (Fig. 7) of the key bolt G (hereinafter called for convenience the inside bolt). The other end of the leverL extends into a groove M on the under side of the key bolt F (hereinafter called the outside bolt), where it is capable of a limited movement independent of the key bolt F (Fig. 7). This movement of the end of the connecting lever'L in respect to the bolt F is so proportioned that when either bolt is in its retracted position, the other bolt'may be thrown in either direction (Figs. 2, 3, 4 and 5) without affecting the retracted bolt. But when the out side bolt F is in its protracted position (Fig. 4), by throwing the inside bolt G outward the connecting lever L will retract the outside bolt F, or, on the other hand, when the inside bolt G istin its protracted osition (Fig. 2), by throwing the outside bot F outward, the connecting lever L will retract the inside bolt G'(Fig. 4). By this. means, when either of the bolts is in its protracted position, and the other bolt is protracted the connecting lever willretract the former, but either bolt may be protracted separately without movement of the other bolt, provided this latter bolt is in its retractedposition.

At the rear of the inside bolt G is a laterally projecting stud or flange N, which when the bolt G is 1n its protracted osition (Fig. ole H of the outside bolt (Figs. 2 and 8), and acts as a ward to a key inserted in this key ho1e,.so that if a key, as 0, (Fig. 12) be inserted in, the ke hole H and turned therein, its bit or web will strike against the lug N, which thus forms a movable ward to prevent the rotation of the key 0 in the key hole H when the inside bolt is in its rotracted position. The retraction of the olt G moves the lug or I tumbler T, pivoted on a 0st WlllCll are plvoted on a common post A 1n movable ward N away from the key hole (Figs. 3, 4 and 7), so that the key may be rotated in the key hole H.

The key R (shown in Fig. 13) is of a master key pattern, the bit of which is cut away at S, so that it will avoid the stud or movable ward N. The key It can, therefore, be inserted in the key hole H and rotated even when the inside bolt is protracted. Upon the rotation of the key It in the key hole H, the outside key bolt F may be protracted, and this movement will retract the inside key bolt G (Fig. 4). The outside key bolt F may then be retracted without moving the inside bolt G, and the door willbe unlocked. I The inside bolt G is shown rovided with a 1 in the case A, and having an opening for a stump W on the bolt. vided with a series of tumblers X, Y and Z,

the case, and have openings B for the rece tion of a stump O on the bolt. Springs holdthe several tumblers in their normal osition, in well known manner. The tumler T'has proj ectin from its rear end a lug E, and the tumblers X, Y and Z have similar lugs H(, which are adapted to enga e with a The tumbler bar acts to raise the tumblers of one bolt when the tumbler or tumblers of the other bolt are raised by the key (Fig. 5), so both bolts are released fromengagement with their respective tum blers synchronously, and are free to be thrown in one direction or the other by the key and connecting lever. A dog K is pivoted on a post L" in the case A, and has one end adapted to engage a 0st or lug M on the inside bolt G (Fig. 6).

free end projects into the hen the bolt G is protracted, the post M. rotates the dog K into the position shown inJFig. 2, where. its path of the bit of a key in the inside key hole In this position (see Fig. 2), the key in the inside key hole cannot be rotated, so that it cannot be withdrawn from the key hole except by retracting the ke bolt G. The key which operates through the inside keyhole must, therefore, remain in the look when the inside key bolt G is protracted.

The operation of this look is asfollows. A person, such as a uest, on the inside of the door, may throw tlre inside bolt G by means of his key inserted in the inside key hole I. The parts are then in the position shown in Fig. 2, and the key is retained in the look by means of the checking dog K. When the arts are in this position, any one inserting a ey, such as O, ig. 12), through the outside key hole H, will it impossible to turn'the key to operate the outside bolt, because the bit will strike against the stud or movable ward N on the inside bolt (Fig. 2). As the inside bolt can be retracted by a key in the outside key hole only by protracting the out- The outside bolt F is shown pro-' side bolt F, it is impossible, therefore, to unlock the inside bolt G when the parts are in the position shown in Fig. 2, by means of the key 0. When, however, it is desired to unlock the door from the outside, as when a guest is taken ill after having locked himself on the inside of the door (Fig. 2), a master key, such as B (Fig. 13) may be inserted in the outside key hole H, the bit of which avoids the flange or movable ward N 'on the inside bolt G (see Fi 8), and this key will rotractthe outside bo t F. As ex lained a ove, the raising of the tumblers Y and Z inpmtracting the outside bolt F raises the tumbler T of the inside bolt by means of the I tumbler bar I (Fig. 5), and-the rotraction of the outside bolt F by means 0 the connecting link L retracts the inside bolt G (Fig. 4); To unlock a door, it is then merely necessary to turn the key in the outside key hole in the reverse direction, and the outside bolt F will be retracted without changing the position of the inside bolt (Fi 3). On the other hand, should any one look the outside bolt F when a guest ison the inside of the room (Fig. 4), it is only necessary for a guest to insert his key in the inside key hole and protract the inside bolt, for, as alread ex lained, the protraction of the inside bo t wil retract the outside bolt by means of the connectin link L when the tumblers of the outside bo t are raised by means of the tumbler bar I (Fig. 2). When the outside bolt is retracted and the inside bolt protracted, it is only necessary to retract the inside bolt b means of the key on the inside of the lock to unlock the door (Fig. 3). I

Having now described my invention (which may vary .in its details. without departing from the spirit thereof), what I claim and desire to secure by Letters Patent,

i 1. In a lock, the combination with a case of a bolt movable in said case; a key hole in when said ward is in its 0 erative position,

the rotation of one of sai keys being permitted by said ward when the key is inserted in said key hole, and the rotation of another key being prevented when so inserted; and means for moving said ward to and from its operative osition, substantially as described:

2. In a ock, the combination with a case; of a plurality of bolts movable in said case a key hole in said case corres onding to one of said bolts; a movable war adapted to be brought into operative position with said ke hole upon the 'movement of the other be t; and a tplurality of ke s, each of which is capable 0 being lnserte in said key hole when saidward is in its operative position, the rotation of one of said keys when som sfi ted being the rotation 0 another key when so inserted being prevented, substantially 'as described.

3] In a lock, the combination with a case; of a plurality of bolts movable in said case; a key hole in said case corresponding to one of said bolts; a plurality of keys; a movable ward adapted to be brought into operative position with said key hole upon the movement of the other bolt, said ward permitting the rotation of one key when inserted'in said key hole, and preventing the rotation of another key when so inserted; and mechanism for retracting one boltu on the protraction ofthe other, substantia ly as described.

4. In a lock, the combination with a! case;

of a bolt movable in said case; a key hole in said case corresponding to said bolt; a second bolt having a device. connected thereto adapted to come into position to act as a. ward for said key hole when said bolt is in one ition and a plurality of keys, each of whic is capable of being inserted in said key hole when said device is acting as said ward, the rotation of one of said keys when so inserted being prevented by said ward, and the rotation of another key when so inserted being permitted, substantially as described.

5. In a lock, the combination with a case;

of a plurality of bolts movable in said case;

a key for operating one bolt from one side of said case and another bolt from another side of said case; a checking device connected to one bolt to prevent the protraction of another bolt when said checking device carryingbolt is protracted, means for preventing the withdrawal of said key when on the corresponding side of said case, after it has protracted said checking device carrying bolt and while said bolt is protracted and means for retracting said checkingdevice carrying bolt when so protracted, substantially as described.

6. In a lock, the combination with a case; of a plurality of bolts movable in said case; a key hole for one of said bolts; a key adapted to be inserted in said key hole to operate said bolt; a device for preventing the operation of said bolt by said key through its key I hole brought into operative position when another bolt is in its protracted position; and mechanism for retracting one of said bolts b the protraction of the other, substantia ly as described.

7. In a lock, the combination with a case; of a plurality of bolts movable in said case; a he hole. for one of said bolts; a movable war adapted to be brought into operative pgsition with said key hole when the other It is in its protracted position; and mechanism for retracting one bolt by the protraction of the other, substantially as described.

8. In a lock, the combination with a case;

permitted by said ward, and

tion of a tumb a device for protracting one of said bolts; means adapted to prevent the operation of said device adapted to be brought into operation upon the protraction of the other bolt; and means for retracting one of said bolts by the protraction of the other, substantially as described.

9. In a lock, the combination with a case; of a plurality of bolts movable in said case; tumblers adapted to engage the respective bolts; and mechanism for operating all of said tumblers in the same direction to release them from enga ement with the several bolts synchronous -y upon the operation of a tumbler of either bolt, substantially as described.

10. In a lock, the combination with a case; of a plurality of bolts movable in said case;

tumblers adapted to engage the, respective bolts; a tumb or bar having connection with said tumblers to operate them in the same direction synchronously upon the operation of a tumbler of either bolt, substantially as described.

11. In a lock, the combination with a caes; of a lurality of bolts movable in said case; tumb ers adapted to engage the respective bolts; mechanism for releasing all of said tumblers from engagement with the several bolts synchronously; and means-for retracting either bolt. u on the protraction of another, substantia y as described.

12. In a lock, the combination with a case; of a plurality of bolts movable in. said case; means for operating one bolt from one side of said case and the other bolt from a different side of said case; a connection between said bolts for retractin either bolt upon the'protraction of the ot er bolt, said latter bolt being retractable independently I of the other bolt by its ownoperating means,

substantially as described. v

13. In a lock, the combination with a case; of a plurality of bolts movable in. said case, each of saidbolts having separate operating mechanism; a connection between said bolts for retracting either bolt upon the protraction of the other bolt, said latter bolt eing retractable independently of the other bolt by its own operating mechanism, substantially as described.

14. In a lock, the combination with a case; of a plurality of bolts movable in said i case; tumblers adapted to engage the respective bolts; a device for protracting one of said bolts; mechanism adapted to prevent the o eration of said device adapted to be brought into operation upon-the protraction of anotherbolt; and means for releasing all ofsaid tumblers from engagement with the several bolts synchronously upon the opera case; of a plurality of bolts movable in said 130 er of either bolt, substantially case; tumb I tive bolts; a key ho e in said case correspond- Y vice is. in its operative osition; and means serted from one side 0 for, brin ing said ward into 0 erative rela-' tion wit said key hole upon t e movement of another bolt; and means for releasing all of the tumblers from engagement with the several bolts synchronously, substantially as, de-

scribed.

16. In a lock, the combination with a case; of a plurality of bolts movablein said ers ada ted to engage the respecing to one bolt; a movable ward mechanism for bringing said ward into operation with said key hole upon the movement of another bolt; a tumbler bar having connection with said tumblers to operate them synchronously; and means for retracting one bolt upon the protraction of the other, substantially as. de-

scribed.

17. In a lock, the combination with a case; of a bolt movable in-said case; a key hole in said case; a key for insertion in said hole adapted to operate said bolt; and a dog pivoted in said case adapted to be rotated by said bolt on its protraction into the path of said keyto prevent the further rotation of said key, substantially as described.

' 18. In a lock mechanism, the combination of a bolt operable by a key inserted through the outer side of the lock and also operable by a key inserted from the inner side ofthe lock, means for preventing the withdrawal of a key inserted at the inner side of the lock after said bolt is extended thereby and while the bolt' is extended, means for er-mitting the retraction of the bolt by anotl ier key inserted from the outer side of the look at such Zing; of a plurality of bolts movable in said F casing; mechanism for retracting one bolt '5 upon the protraction of the other; a plurality time.

19. In a lock mechanism, the combination with a case of a bolt movable in said case,

the other side of said case; means for preventing the withdrawal of the key after it has operated said device and while saiddefor permitting the with rawal of. said device from the other side of said case at such time, substantially as described.

20. In a lock mechanism, the combination with a case; of a bolt 0 erable by a key ini said case; another bolt operable b a key inserted from the other side of said case means for preventing the withdrawal of a key inserted at one side of said case after its corresponding bolt is protracted thereby and while so rotracted; and mechanism for retracting said bolt upon the protraction of the'other bolt, substantially as described.

21. In a lock in combination, a lock case, two lock bolts therein, a keyhole in each side of said lock case, said keyholes being. out of line, and means by which each of said bolts may be. operated from both sides of the door.

22. In a lock, the combination with a casing; of a boltmovable in said casin a key I hole on each side of said casing; .di erently bitted keys ada ted too erate said bolt; and

Y a device carrie by sai bolt to prevent its jretraction through one key-hole by one of 'said keys, and permitting its retraction by another of said ke s in said key-hole, substantially asdescri ed.

23. In a lock, the combination with-a casin of a bolt movable in said casing; .a keyhole in each side of said casing; keys adapted to operate said bolt through either key-hole; and mechanism for preventing the retraction of said bolt through the key-hole on one side by a certain key or keys when the 'bolt is in its rotracted position, substantially as descri ed.

24. In a lock, the combination with a easing; of a bolt operable from either side of said casing; differently bitted keys for operating said bolt from one side of said casing; and :mechanism for preventing the operation of i said bolt by one of said keys operated from the other side of saidcasing, substantially as E described.

25. In a lock, the combination with a casin of a bolt movable in said casing; a ke hole in each side of said casin ;'and aplura ityof keys capable of insertion in said key holes, one of said keys being adapted to retract said-bolt from either side ofsaid casin iand another being adapted to retract said bolt from one side only, substantially as described. i

- 26. In a lock, the combination with a caskeys adapted to protract either. of said bolts ;.and means for preventing the protraction of one bolt by one of said keys when the described.

28 In a lock, the combination with a casing; of a bolt movable therein; a key-hole in said casing; a key for insertion in said keyhole adapted to operatesaid bolt; and means brought into operation by said bolt for preventing the withdrawal of the ke when so inserted in said key-hole after said olt is protracted thereby, and while it is so protracted, but permitting said key to retract said-bolt, substantially as described.

29. In a lock, the combination with a casios 1 key-hole in each side of said casing; means by ing; of a plurality of bolts movable therein; a Trey-hole in each side of said casing means by which each of said bolts may be 0 erated from either key-hole; and a device or preventing the Withdrawal of the key when inserted in one key-hole after its bolt is protracted thereby, and while it is so protracted, substantially as described.

30. In a look, the combination witha casing; of a plurality of bolts movable'therein a which each of said bolts maybe operated from either key-hole; and a device reventing the operation of a key in one ey-hole brought into operation when one bolt is in one of its positions, substantially as described.

31. In a lock, the combination with two bolts and'turnbler mechanism therefor; of two keys insertible from the outer side of said lock for releasing said tumbler mechanism and operating said bolt; a third key insertible from the inner side of the lock; mechanism operable thereby for simultaneously releasing both sets of tumblers; and means of connection between said bolts whereby the protraction of each bolt causes the retraction of the other bolt, substantially as described.

In witness whereof I have hereunto set my hand on the 30th day of August, 1904.

WILLIAM J. CARROLL. 

